Mechanical

Question 1

Torque

Answer 1

Is defined as a force which tends to rotate a body about an axis. The unit of torque is the newton meter (N/m)

Question 2

Speed

Answer 2

Is a scaler quantity which describes distance travelled by a body per unit time. Speed is measured in meters per second (ms-1)

Question 3

Force

Answer 3

Is manifest by its efforts on a body. Force can cause a body to accelerate, deform or rotate. Force is measured in units Newtons (N)

Question 4

Friction

Answer 4

Friction is the resistance force that occurs when two forces come together with one of them having movement with velocity it an cause deformation and generates heat. SI unit

Question 5

Stress

Answer 5

Pressure or tension exerted on a material or object. SI unit N/m2

Question 6

Strain

Answer 6

A force tending to pull or stretch an object to an extreme or damaging degree. No unit

Question 7

Thermal energy

Answer 7

The total vibrational energy in all the molecules and atoms in a certain substance

Question 8

Length

Answer 8

The measure of distance in one dimension. SI unit meters (m)

Question 9

Pressure

Answer 9

The result of force acting on a area

Question 10

Mass

Answer 10

Is the quantity of matter which a body is said to possess. The S.I unit of mass is kilograms (Kg)

Question 11

What can affect the energy in a mechanical devices

Answer 11

Energy losses in a mechanical system can be friction between moving surface